Television signal transmission system with carrier offset compensation

A television signal transmission system comprising:

• means for providing an input video data signal including a plurality of input data subsegments each comprising an input sequence of interspersed N-level data symbols spaced from each other by a predetermined time interval;
• processing means including a modulo-N precoding filter including a feedback path characterized by a delay equal to said predetermined time interval for modulo-N precoding and modulo-N offsetting each of said input subsegments for providing a respective output subsegment, each output subsegment comprising a sequence of N-level symbols the majority of which comprise a predetermined level;
• means for transmitting said output subsegments;
• means for receiving said transmitted output subsegments;
• and
• means including a complementary postcoding filter for reconstructing said input data signal in response to said received signal, said postcoding filter comprising a filter circuit including a feed forward path characterized by a delay equal to said predetermined time interval.

A television signal transmission system comprising:

• means for providing an input video data signal in the form of an input data segment comprising a sequence of N-level data symbols spaced from each other by a predetermined time interval;
• processing means including a modulo-N precoding filter including a feedback path characterized by a delay equal to said predetermined time interval for modulo-N precoding and modulo-N offsetting the symbols of said input segment for providing an output segment, said output segment comprising a sequence of N-level symbols the majority of which comprise a predetermined level;
• means for transmitting said output segment;
• means for receiving said transmitted output segment;
• and
• means including a complementary postcoding filter for reconstructing said input video data signal in response to said received signal, said postcoding filter comprising a filter circuit including a feed forward path characterized by a delay equal to said predetermined time interval.

A television signal receiver comprising:

• means for receiving a television signal comprising a plurality of successive data frames, each of said data frames comprising a plurality of data segments with each data segment including a first group of received adjacent symbols representing a predetermined synchronization character, a second group of received adjacent N-level modulo-N precoded and offset symbols representing a transmitted video-related data signal and a third group of received adjacent N-level symbols representing the amount of offset characterizing the symbols of said second group of received symbols, each of said third groups of received symbols being disposed between one of said first groups and one of said second groups of received symbols;
• means coupled to said receiving means for developing a synchronization signal in response to said first group of received symbols;
• and
• decoding means coupled to said receiving means and responsive to said first, second and third groups of received symbols for generating respective first, second and third groups of decoded symbols, said second groups of decoded symbols representing said video-related data signal.

A method of transmitting a television signal comprising:

• generating a television signal comprising a plurality of successive data segments, each of said data segments comprising a first group of adjacent symbols representing a predetermined synchronization character, a second group of adjacent N-level modulo-N precoded and offset symbols representing a video-related data signal and a third group of adjacent N-level symbols representing the amount of offset characterizing the symbols of said second group of symbols, each of said third groups of symbols being disposed between one of said first groups and one of said second groups of symbols;
• transmitting said television signal;
• and
• receiving said transmitted television signal.